lama hasan is outside of the hospital where kate middleton checked out, roses in her hand. good morning, lama. >> reporter: good morning, george. just moments ago, a very happy duke and duchess of cambridge left the hospital behind me. one of the reporters asked kate if she was feeling any better. kate nodded and smiled and replied yes. after three days and three nights in the hospital, kate, suffering from acute morning sickness, just departed the hospital with william, waving and smiling to well-wishers. the palace told abc news, she will head to kensington palace for a period of rest. william and kate issued a statement, thanking the staff at the hospital for the care and treatment the duchess has received. kate will be trying to recuperate at home. but this condition sometimes lasts through the first trimester. and some mothers in the most difficult cases face symptoms throughout the pregnancy. >> if she's been hospitalized already this early on in the pregnancy, that means there's a greater chance she'll be hospitalized again. >> often times, we see people coming back